has specified data input has specified data output has format specification is published by is executed in R data frame sizepower This package has been prepared to assist users in computing either a sample size or power value for a microarray experimental study. The user is referred to the cited references for technical background on the methodology underpinning these calculations. This package provides support for five types of sample size and power calculations. http://bioconductor.org/packages/2.4/bioc/html/sizepower.html Nandini Badarinarayan BioConductor Software R software background correction data normalization differential expression analysis Bioconductor